Communication Apparatus and Method in a Communication Network System

1. A communication apparatus comprising: a reception unit configured to, receive a first frame having a first format and a second frame having a second format in which information is reduced with respect to the first format and extract a first identifier existing in both the first frame and the second frame; a first frame processing unit configured to process the first frame; a second frame processing unit configured to process the second frame; a table including a correspondence between the first identifier and a second identifier indicating whether the first frame and the second frame having the first identifier is in the first format or the second format; and a control unit configured to transfer the first frame or the second frame to one of the first frame processing unit and the second frame processing unit based on the table when the frame is received.

2. The communication apparatus according to claim 1 , further comprising: a third frame processing unit, wherein the table includes a third identifier indicating which one of the first processing unit, the second processing unit, and the third processing unit the first frame and the second frame should be processed while corresponding to the first identifier, and wherein the control unit transfers the first frame or the second frame to one of the first frame processing unit, the second frame processing unit, and the third frame processing unit based on the table when the frame is received.

3. The communication apparatus according to claim 2 , wherein the table includes a fourth identifier indicating a number of user TAGs included in the frame format of the first frame and the second frame while corresponding to the first identifier, and wherein the control unit identifies an area where the third identifier in the frame format is stored and transfers the first frame or the second frame to one of the first frame processing unit, the second frame processing unit, and the third frame processing unit based on the table when the frame is received.

4. The communication apparatus according to claim 2 , wherein the reception unit is further configured to receive a third frame having a third format in which information is reduced with respect to the first format and the second format.

5. The communication apparatus according to claim 4 , further comprising: the third frame processing unit configured to process the third frame; the table including a correspondence between the first identifier, the second identifier, and a third identifier indicating whether the first frame, the second frame, and the third frame having the first identifier is in the first format, the second format, or the third format; and the control unit configured to transfer the first frame, the second frame, or the third frame to one of the first frame processing unit, the second frame processing unit, and the third frame processing unit based on the table when the frame is received.

6. The communication apparatus according to claim 1 , further comprising: a transmission unit configured to generate a frame having the first format or the second format and transmit the frame having the same format as the frame received from an opposite communication apparatus to the opposite communication apparatus.

7. The communication apparatus according to claim 6 , wherein the transmission unit respectively stores information for identifying the first format or the second format in the frames having the first format or the second format for transmission by using an unused bit included in the first format or the second format.

8. The communication apparatus according to claim 1 , wherein the communication apparatus is one of a L 2 switch, a L 3 switch, and a router in a communication network.

9. The communication apparatus according to claim 1 , further comprising: a collection unit configured to calculate a data transfer amount based on the first frame and the second frame received.

10. A communication method in a communication network system, the method comprising: transmitting, by a first communication apparatus included in the communication network system, one of a first frame having a first format including a first identifier and a second frame having a second format including the first identifier in which information is reduced with respect to the first format, to a second communication apparatus included in the communication network system; and performing, by the second communication apparatus, a frame processing corresponding to the first format or the second format based on a table accessed with the first identifier included in the received first frame or second frame, the table including a correspondence between the first identifier and a second identifier indicating whether the first frame and the second frame having the first identifier is in the first format or the second format.